Valve mechanism



F. L. PIVOTO VALVE MECHANISM Feb. 5, 1929.

Original Filed Aug. 18, 1927 Reissued Feb. 5, 1929.

S UED PATENT o FicE.

FELIXVL. rivoro, or BEAUMONT, TEXASL vALvE MECHANISM."

Original No. 1,76,666, dated July 10, 1928', Seri al NoQ213B02, filed Aug ust 18, 1927. A ncatioa for reissue filed December 10,

This invention relates to new, and. useful improvements in a valve mechanism.

One objectof the invention lsto provide a valve mechanism'specially adapted for use in connection with a set shoe, with which the lower end of the screen or pipe is equipped. when setting the same in a well.

Anotherobject of the invention is to provide a novel type of fluid back pressure valve in connection with a Valve guide and valve protecting screen.

A further feature of the invention isto provide ELHOVQ]. type of back pressure valve adapted to be assembled with a set shoe and ence designate similar parts in each of the 1 of'such construction asto provide for a greater clearance for thepassage of fluid than is the case with back pressure valves now in common use for such purposes and embodying also a novel type of screen for protecting the valve from the accumulation of foreign matter.

With the above and other'objects in view the invention has particular relationto certain novel. features of construction, operation and arrangement of parts, an example,

of which is given in this specification and illustrated in the accompanying drawings, wherein:. 7 1

Figure 1 shows a vertical sectional view of a set shoe attached to the lower end of a well screen and showing the back pressure valves assembled therewith. v P

Figure 2 shows a cross sectional view taken on the line 2-2 of Figure 1, and v Figure 3. shows a cross sectional view taken on the line 3-3 of Figure 1.

. Referring now -1nore particularly to the drawings,wherein like numerals of referfigures, the numeral, 1 designates a, tubular set shoe of conventional construction whose lower end. is contracted and of oval formation, as at 2, so that it will readily follow the course of the bore in settingthescreen or" other pipe to which the set shoe is attached. Thislower endis detachable and is'threaded up into a section of the shoe above it which isinternally]threaded as at 3. The upper endof the set shoe is internally threaded as at 1, and a'tuhularwash pipe seat 5 is screwed therein and has its upper end 6 flared to receive the lower end of the wash pipe. The set shoe isattached to the lower end ofthe well screen 7 When thescreen 192s. Serial Nb. 325,062.

or pipe 7 is set, and it desired towash the outside of the same awash pipe is lowered therein andf1ts lower end 1s seated in the the valves, assembled with the set shoe, and.

Y Re. 17,206

hereinafter described, and passes out through I the opening 8 atthe lower end of the set shoe and up around said screen.

Normally however, said valvesare closed to prevent the inflow of fluid into the screen 7 up through said set shoe. The lower end of the wash pipe seat 5 is formed with an annular valve seat 9 having acentralv opening 10. Spanning thewashpipeseat 5 and preferably formed integral therewith there is a spider 11, above the valve seat, having a centralbearing 12 which is preferably flared each way. The numeral 18 designates the lower annular valve seat which 'is screwed up into the set shoel and which has a central' opening 14. Formed integrally within the valve seat 13 there is a spider preferably consisting of the oppositely disposed upwardly converging legs 15, 15, whose up per ends are flllltd by a ring 16 having a central bearing 17 therethrough which is flared each way. There are the upper and lower valve stems 18,18, which depend through the respective bearings 12. 17 and whose upperends are formed with heads 19', 19 having convex surfaces which work in downwardly converging joints 1 into which the upper ends of the respectivehearings 12, '17 are formed.- There are the conical shaped back pressure valves 20-, 20, slidingly mounted on the respective stems 18, 18 and these respective valves have the depending housings 21, 21, which are perforated or formed of foraininated,material. These valves normally control the openings 10, 14 respec tively and prevent the upward. passage of fluid through the set shoe but'open to permit the downward passage thereof; Within each housing 21 there is a packing 22 which closely surrounds thecorresponding stem 18 and prevents leakage up through the valves and which are held in place by glands as 23 fittedaround the stems and held against the underside of said packing rings There are. the washers 2 1 which'are maintained on the lower ends of the stems, by the nuts 25. screwed thereon, and which fit closely within the said housings and between the washers 24 and the corresponding glands 23 and surrounding the stems .18 there are the coil springs as 26 which normally operate to hold the glands 23 against the packing 22 as well as to maintain the valves 20 seated. The seats 12and 17 are so formed as to permit the stems 18 to freely swing laterally in any direction when the corresponding valves are open by fluid pressure from above and this permits said valves also to swing laterally as indicated in dot-ted lines in Figure 1. This freedom of movement of the valves provides a greater clearance for the additional passage of fluid as well as the passage of foreign matter through the openings 10 and 14.

In order to prevent the entrance of foreign matter into the valves, particularly large particles of foreign matter which are liable to clog said valves, I have provided a tubular screen as 27 whose upper end is closed and whose lower end is threaded into the upper end of the wash pipe seat 5 within the flared upper end 6 thereof. This screen is perforated or foraminated and may be of a length to give the required screening capacity and it will be effective to exclude particles of foreign matter from the valves by which they are liable to be clogged or held open. This screen is threaded into the wash. pipe by means of left hand threads.

. The housings 21 are also perforated, as hereinbefore stated, sothat any foreign matter collecting therein may be readily ejected.

While I have shown what I now consider the preferred form of this valve mechanism, it is obvious that various mechanical changes may be made therein and equivalents substituted for the parts shown and it is contemplated that such changes and adaptations may be made in the structure and such equivalents substituted, as are comprehended within the scope of the appended claims.

\Vhat I claim is 1. A valve mechanism including a valve seat having an opening, a downwardly opening valve controlling said opening, a bearing member above said seat having a bearing therein, a stem sup-porting the valve and working through and having a swiveling connection with said bearing, ayieldable member associated with the stem and normally holding said valve in closed position, a screen disposed above the seat and provided to exclude foreign matter therefrom.

2. A valve mechanism including a valve seat having an opening, a downwardly opening valve controlling said opening, a spider disposed above said seat and formed with a bearingaligned with said opening, a valve stem to the lower end of which said valve is connected, said stem working through said bearing and having a universal connection therewith to provide free lateral play of the valve relative to the seat, means normally holding said valve yieldingly against said seat and a screen disposed above the seat and provided to exclude foreign matter therefrom.

3. A valve mechanism including a seat having an opening, a spider disposed above the seat and having a bearing aligned with said opening, a. stem extending through said bearing and sustained thereby, a valve associated with the lower end of said stem and normally closing said opening, said valve having a depending fora ninated housing, an abutment carried by the lower end of the stem, av yieldable member enclosed within said housing and interposed between said valve and abutment and normally holding the valve yieldingly against its seat in position to close the opening thereof.

4. A valve mechanism includinga seat having an opening therethrough, a spider disposed above said seat, a downwardly opening valve controlling said opening, a stem on which the valve is slidably mounted, the upper end of said stem having a head which has a swiveling connection with said spider, an abutment carried by the lower end of the valve stem, a fo-raminated housing depending from said valve, a yieldable member enclosed by said housing and interposed between said abutment and valve and normally holding the valve yieldingly against its seat in position to close said opening.

5. A valve mechanism including a seat having an opening t-herethrough, a spider disposed above said seat, a downwardly opening valve controlling said opening, a stem on which said valve is mounted, the upper end of the stem having ahead which has a swivelling connection with said spider, an abutment carried by the lower end of the valve stem, a yieldable member interposed between said abutment and valve and normally holding the valve yieldingly against its seat in position to close said opening, a housing carried by the valve and enclosing said yieldable member, said housing being provided with perforations. 7

6. A valve mechanism including a valve seat having an opening therethrough,a spider disposed above said seat and having a bear ing, a valve stem whose upper end has a swiveling connection with said spider and which works through said bearing and opening, a downwardly opening valve controlling said opening and having a bearing on said stem, a foraminated housing depending from said valve, a packing within the housing around the stem, a gland in the housing abutting said packing, an abutment carried by the lower end of the stem, a. yieldable member interposed between said abutment and gland and enclosed by said housing.

7. A valve mechanism including a valve seat having an opening therethrough for the passage of fluid,'a downwardly opening valve controlling said opening, an anchor associated with said seat, a valve stem sustained by the anchor andhaving a swinging connection therewith, said valve beingconnected to said stem, a foraminated housing depending from the valve, a yieldable member within said housing and sustained by said stem and normally operatingto hold the valve yielding against said seat andin position to close said opening.

8. A valve mechanism including a tubularsupporting member, a valveseat therein having an opening, a downwardly opening valve controlling said opening, an anchor associated with said seat, a valve stem. sustained by the anchor and having a swinging connection therewith, said valve being connected to said stem, a; housing depending from the valve, a yieldable member within said housing and sustained by the stem and normally operating to hold the valve yieldingly against said seat and in position to close said opening.

9. A valve mechanism including a valve seat having an opening therethrough for the passage of fluid, a downwardly opening valve controlling said opening, an anchor associated with said seat, a VELlVGStBHI sustained by the anchor and having a swinging connection therewith, said valve being connected to said stem, a yieldable member sustain'ed bythe stem and normally operating to hold the valve yieldingly'against said seat and in position to close said opening.

10. A valve mechanism including a tubular ,member having a valve seat in its lower end provided with an opening, a transverse spider in said tubular member above saidseat having a bearing, a stem fitted through said bearing and having a swinging connection there with and extending through said opening, a downwardly opening valve slidable on said stem and controlling said opening, a yieldable member sustained by the stem and normally operating to hold the valve yieldingly against said seat in positionto close said opening.

11. A valve mechanism including a tubular member having a valve seat in its lower end provided with an opening, a transverse sp1der in said tubular member above said seat having a bearing, a stem fitted through said bean ing and having a swingingconnection there. with and extending through said'opening, a downwardly opening valve slidable on said stem and cont-rolling said opening, a yieldable member sustained by the stem and normally operating to hold the valve yieldingly'against said seat in posltlon to close said opening,

and a screening device attached to'the upper end of said tubular member.

12. A valve mechanism including a valve seat having an opening, a downwardly opening valve controlhng the opening, a bearing member above said seat having a bearing therein, a stem supporting the valve and working loosely through said bearmg, and

position.

having swinging connection therewith to permit the tree swinging of said valve, and a yieldable member associated with the stem and normally holdingsaid valvein closed 13. A valve mechanism including a valve seathaving an opening, a downwardly opening valve controlling said opening, a cage mountedon said seat and formed with a bearing aligned with said opening, a valve stem to the lower end of which said valve is connected, vsaid stem working through said bearing and having a swivelling connection with the cage to permit iree lateral play of the valve and means normally holding said valve yieldingly against saidseat.

1a. A valve mechanism including a valve seat having an openingtherethrough, a valve cage carried bysaid seatand formed with a bearing aligned with said opening, a valve stem working through the cage and bearing and having a lateral or swinging movement relative to the cage, and having a universal f connection with the cage, a valve disposed on the opposite side of the seat from the cage, said valve being'connected to the stem and controlling said opening and means normally holding said valve yieldingly against said seat.

15. A valve mechanism including a valve seat having an opening therethrough, a valve cage above the seat andformed wlth a bearing aligned with said opening, a valve disposed opposite the cage and controlling said opening, a valve stem having a universal connection with the cage and to which the valve is connected, said stem working through said cage bearing and having a lat- ,eral or swinging, movement relative to the and seat, a yieldable member associated with the stem and normally operating to hold said valve seated to close said opening.

16. Avalve mechanism including a seat having an opening theretln'ough, a cage disposed above said scat, a downwardly opening valve controlling said opening, a stem; on a which the valve is slidably mounted, "the upper end of said stein having a head having a swivelling connection with-the cage, an abutment carried by the lower end of the valve stem, a yieldable member interposed between said abutment and valve and normally holding the valve yieldingly against its seat in position to close said opening.

17. A valve 'mechanism including a seat having an opening therethrough, a cage disposed above said seat, a downwardly opening valve controlling said opening, a stem on which the valve is slidably mounted, the

upper end of said stem having a head having a swiveling connection with the cage, an

abutment carried by the lower end of the valve stem, a yieldable member interposed between said abutment and valve and normally holding the valve yieldingly against itsseat in position to close said opening, a hoi ising carried by the valve and enclosing said yieldabl-e member.

18. A valve mechanism including a valve seat having an opening therethrough, a cage disposed above said seat and havinga hearing, a valve stem whose upper end has a swivelling connection with the cage and which works through said hearing and opening, a valve controlling said opening and having abearing on said StEHL, a housing depending from said: valve, a packing within said housing around the stem, 2; gland in the housing abutting said packing, an abat ment carried by the lower end of the stern and a yield able member interposed between said abutment and" gland and enclosed by said housing.

19. A valve mechan sm ineluding a valve seat having an opening there-through for the passage of fluid, a valve controlling saidop-cning, an anchor associated with said seat, a valve stem sustained by the anchor and having a swinging connection therewith, said valve being connected to said stem and means associated with the stem and normally holding the valve yieldingly against theseat and in position to close said opening.

In testimony whereof I have signed my name to thespecification FELIX L. PIVOTO. 

